Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b360f238461566cfaf967c59f850cd2e0ff1b2590c48d5861b68acdf733d0fc2' 
  AND token = '69g0S085tjqFDHrv08Cv6kpZ1paNP727LuzFcF3Njdg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00801

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}